WJ-IV Case Study

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The Woodcock Johnson – Fourth Edition (WJ-IV) was administered in order to obtain an estimate of Isaac’s current level of cognitive functioning. Intelligence tests are intended to assess the student’s ability in acquired skills and specific knowledge, problem-solving capabilities, and memory. The scores obtained on the WJ IV can provide an estimate of the student’s performance in school. Nevertheless, these tests do not measure Isaacs’s interest in creativity, curiosity, perseverance, and motivation. The WJIV yields the students cognitive ability information from six clusters: General Intellectual Ability (GIA), Gf-Gc Composite, Comprehension-Knowledge (Gc), Fluid Reasoning (Gf), Short-Term Working Memory (Gwm) and Cognitive Efficiency. An average standard score (SS) on the WJ IV is 100 and an average range of scores falls between 90 and 110. A percentile rank indicates that a student performed as well as or better than the percent of children her age on whom this test was normed. The confidence interval is a range of scores that is often calculated at the .05 level and suggests that statistically, the student’s score should fall within that range 95% of the time if retested in that area. Isaacs’s scores are based on his chronological age of 14 years and 5 months and 15 days.

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This cluster assesses Isaac’s declarative and procedural knowledge. Declarative knowledge consists of factual information, comprehension, concepts, rules and knowledge of relationships, especially when the information is verbal. Procedural knowledge refers to the operating skills. An individual performs a task automatically after a period of initial learning, like driving a car. Isaac obtained an overall standard score of (117) in the High Average range for this cluster. The table below outlines Isaac’s Comprehension-Knowledge (Gc) standard scores according to the WJ
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